Paul;
Check the electrical departments at Home Depot and Lowes for inexpensive
plastic boxes made by Carlton. These are fully weatherproof boxes
without any knockouts that are excellent for weatherproofing
preamplifiers. You will probably need some type N bulkheads that have a
long neck so that you can pass through the plastic plus whatever
aluminum gauge ground plane you might want to bond your preamps to. I
just got through rebuilding a wideband amplifier 25 MHz -1 GHz for my
receiver, and I have a second one built at least 12 years ago for
240-270 MHz that although the box is pretty weathered, the electronics
inside including a bandpass graph and notes on paper inside, look like
new. Absolutely no water intrusion although outside for years. Get a
bigger deeper box than you think you need. I used 6x6x5 inch boxes.
For this one I used a Polyphazer "pickoff" to extract 15V DC from the
coax to run a gasfet preamp and a WJ 28 dB gain T08 amplifier.
--
Joe Leikhim
Leikhim and Associates
Communications Consultants
Oviedo, Florida
www.Leikhim.com
JLeikhim at Leikhim.com
407-982-0446